Philips Sonicare Series 4100 Electric Sonic Toothbrush HX3689/41, 31000 movements/minute, 1 cleaning mode, 2 intensities, pressure sensor, BrushSync & SmartTimer functions, 1 brush head, Pink Paradise Goodbye, manual toothbrush. Hello, Sonicare. Helps whiten teeth every time you brushSonic technology combined with the action of the brush gently removes stains, for naturally whiter teeth with every brushing. Helps whiten teeth every time you brushThe Sonicare electric toothbrush with advanced sonic technology gently removes stains for naturally whiter teeth every time you brush. Pressure sensor helps protect teeth and gumsThe built-in pressure sensor automatically detects the pressure you apply, alerts you and automatically reduces the toothbrush's vibrations to help protect your gums. The toothbrush will beep intermittently to remind you to reduce pressure. 7 out of 10 people found this feature helped them brush more effectively. Optimize your brushing with SmarTimer and QuadPacerThe 2-minute SmarTimer and 30-second QuadPacer guide you to brush your teeth for the recommended interval, in all areas of your mouth, to ensure a thorough clean. Switch between 2 intensity settingsSwitch between 2 intensity settings to make your brushing session comfortable for you. Our unique technology gives you a deep yet gentle clean. Powerful bristle vibrations create microbubbles that penetrate deep between teeth and along the gum line for a comforting experience. You'll get the equivalent of a month's worth of manual brushing in just 2 minutes. 31,000 brushing movements per minute gently clean your teeth, loosening and removing plaque for an exceptional daily clean. Always know when to replace your brush heads. All brush heads wear out over time, so you need to be careful to ensure you get a great clean. Our BrushSync technology monitors how long you've used your brush head and how hard you've brushed. The BrushSync replacement reminder on the handle and a short beep let you know when it's time to replace it. Battery life: 14 daysThe battery life is up to 14 days, so you can use it for long periods without charging. Use less. Reuse moreOur ambition at Philips is to reduce e-waste. One way to do this is to minimize the number of adapters we put on the market. These products are shipped without a power adapter, as we are committed to reducing e-waste.